The softening of the elastic gasket is related to the pressure and temperature. When the gasket loses its elasticity, the plate heat exchanger will drip. In some products, in order to solve the leakage caused by the aging of the gasket, allowing the heat exchanger to adjust the sealing performance, that is, once again tighten the combination of plate heat exchanger bolts, adjust the heat exchanger between the elastic gasket The pressure to solve the drip problem.
In the nameplate of the plate heat exchanger with this function, the maximum and minimum stresses are generally given. For new plate heat exchanger chipset, the minimum allowable stress should be used for connection fixation. Depending on the number of plate heat exchangers in each group, the tightening force of the plate heat exchanger can be adjusted one or more times. Each time the screw is tightened, the nut can be screwed into 3 mm and the stress of the regulating piece is always observed during the tightening , And only allow the heat exchanger without working pressure, at room temperature to adjust the tightening force to prevent dripping.
For plate heat exchangers that do not give a stress adjustment range on the nameplate, the stress values ??are generally given in the part drawing. When tightening this type of plate heat exchanger, the tightening torque should not be below the values ??specified in the drawings, Because it is with the plate heat exchanger assembly quality, assembly deformation. When the tightening torque reaches the specified value, the elastomeric gasket may be replaced in a planned manner. For a plate heat exchanger used in important production equipment and in corrosive media, it is advisable to have a spare seal. Warehouse temperature 18 ℃, in the transparent plastic packaging, the plate heat exchanger seal can be stored for 3 years or so.